#intersection

Array Intersection

Array Intersection Array intersection returns the elements that appear in both input arrays. The result can be defined as a set of distinct values or as a multiset that preserves counts. You use it when you need to find overlap between datasets. Problem Given arrays $A$ and $B$, compute: $$ A \cap B $$ Two common variants: distinct intersection: each value appears once multiset intersection: each value appears $\min(count_A, count_B)$...